Portable radial drills



E. G. LINDH'E.

PORTABLE RADIAL DRILL.

APPLICATION FILED APR. 19. 1919.

Patented Oct. 25, 1921..

2 SHEETS-SHEET I.

ATTORNEY a m L I M 2 u 92 W m J 1 m 5 W Y 2 W, Tm t m .M .0 s L a d 2.,E2w m 7 m /2 a M P M 5.1;. LINDHE PORTABLE RADIAL DRILL. APPLICATIONFILED APR. 19. 1919.

UNITED STATES.

PATENT orr cs.

ERIC G. LINDI-IE, or YoRK, v. .Y. I

, M roRTABLn RADIAL DRILLS.

To all whom it may concern:

Be it known thatI, ERIC G. LINDHE, a citizen of the'United States,residing in the city of New York,borough of Manhattan, in thecounty andState of New York, have invented a certain new and-useful Improvement inPortable Radial Drills, of which the following. is aspe'cification.

The invention relates to movable apparatus in which a portable drill ofthe usual electric or analogous type may be mounted and operated, andthe main object. of the inventionis to provide such apparatus in asimple economically constructed form with provisions for adjustment andpresentation of the. drill-point in all directions with greater accuracythan canbe attained when such drill is directed manually.

Another object is to provide the truck on which the drill'is mounted,with means for locking and leveling to insure stability, and a furtherobject is to supply such'truck with a drill table to permit the"apparatus equipped with a portable drill, to be used as a drill-press.

Another important object is to provide meansfor folding the main'columnupon the truck, and for folding the radius arm" upon the column foreconomy of space in packing for transportation, and for moving theapparatus in situations of restricted height. y

A further object is to, provide a universal adapter-read in which theportable drill is detachably mounted, permitting the portable drill tobe removed and used manually when desired. Y 1

The invention consists in certain novel features and details ofconstruction and arrangement by which the above and other objects areattained, to be hereinafter described and claimed. l

The accompanying drawings form a part of this specification and show theinvention as it has beencarried out in practice.

Figure lis a side elevation of the com plete machine, with the portabledrill shown in outline in dotted lines.

Fig.2 is a corresponding plan view.

Fig. 3 is a front elevation'of the truck alone, 011 a larger scale,showing the leveling and locking means. V

Fig. 4 is a plan view of the forward draft mechanism of the truck.

Fig. 5 is a vertical central section through theforward portion of thetruck, showing as usual and adapted to receive and Specification ofLetters Patent. Patented Oct, 25, 1921 Application filed April 19, 1919;

Serial No. 291,218;

the lower end of the the hinged base therefor, and partly in elevation.1

Fig. 6 is a similar view of the upper end ofthe columnand the carrierfor theradiusarm.

Fig. 7. is an elevation of the lower portion of the column at itsjunction with the base, seen at a right angle to Figs. 5 and 6. i

Fig. Sis an end elevation of theradiusarm, showing theuniversaladapter-head in which the portable drill is carried, and

partly in vertical section.

Fig. 9 is an elevation of one'of the guide rods for supporting theportable drill, showing the supporting bar in vertical section.

Similar letters of reference indicate the same parts in all the figures.

A is the platform ofthe truck suitably ribbed to provide'the requiredstrength and rigidity, supported on low Wheels A A those at the rear Amounted on fixed centers, and those at the front mounted on swivelingbrackets A having arms and links connecting the brackets and drawbar msuch manner as to permit the truck to be turned in curves of shortradius, as war be understood, by means of thetongue A On the upper faceof the platform are lugs A and bosses A"; the lugs receive a pinextending transversely through them and a lug B on the hollow verticalbase B to form a hinge for" the latter and the bosses are arrangedtosupport the ends of a bifurcated projection B on the front of the base,in which is secured a swing-bolt A by which the base is firmly, held inthe upright position. The upper portion of the base is cylindrical andreceives a collar G forming part of a bracket C carrying at its outerend a removable drill-table- C slotted support a piece to be drilled.

In the upper end of the base is firmly vertical column and fixed thetubular standardfor column D eX- tending vertically and surmounted by acap 1) having a rabbetTd on its under face,

see Fig. 6." The upper face of the base B is' similarly rabbeted at I),see Fig. 5, to form an annular groovein which is received the reducedlower end of a loose rack D the reduced upperend' ofwhich is received inthe guided in the rabbets.

' groove. formed by the rabbet (Z. Thus mounted the rack D may movecircumfer entially about the column while held and The rack extendsthrough a vertical groove 8 in a carrierE arallel with the'column.

shaped to inclose the column and slide vertically thereon, with theteeth of its pinion E engaged with the rack. The pinion is turned by anysuitable means, not shown, in a. casing E on the carrier, operated by acrank E through which the carrier is raised or lowered on the column.The long vertical groove 6 in the carrier supports the rack laterallyand carries it around the column as the carrieris rotated on the latter,with the teeth of the pinion always in engagement. It will be notedthatthe rack supports'the weight of the carrier and its connections, andin order to lessen the fric-.

tion of the lower end of the rack upon the fixed base, a roller D ismounted on the outer face of the'rack at the lower end, whidch ridesupon. the base and sustains the loa Lugs E on the carrier receivebetween them a lug E on a laterally extended tubular socket-piece E andform. a hinge therefor upon the pin E and a swing-bolt E engages in anotch ev in. the upper portion of the socket-piece and holds the latter.In the socket-piece E is fixedly set-the tubular radius-armfF extendingat a right angle horizontally from the carrier 'E and sup-.

ports the adapter-head in which the portable drill Mis mounted. Thehinge at E per-' mits the radius-arm to fold down upon and F is a splittubular slide ,inclosing the radius-arm F, rotatable thereon andclamped.

in position by the bolts F It is provided groove 7, and a pinion Ffturnedv by worm gearing notshown, inclosed in a casing 'F on the sleeve,operated by a handwheel F; a rack G on a cylindrical bar G- slidablymounted in the sleeve, is engaged by the teeth of the pinion F. Byturning the handwheel F the bar G is raised orlowered,

as will be understood. At the lower end of the bar G is a collar Grabove which is an adjustable clamp G controlled by thev bolts G r H isan L-shaped bracket disposed horizontally with one; end bolted to theclamp G as at G see Fig. '8, and at the other end at H to a boss J on-atransverse head I J. The outer face ofthe head J is cut away to providea wide groove or way in which is secured a horizontally disposedrectangular bar J projecting on each side of the head; the overhung endsof the bar J each ,carries a guide J grooved to match to the bar andsecured thereto by screws or other suitable means.

Each guide J has a vertical boss or'sleeve J in which slides freely avertical tubular suspension rod or guide-bar L each ofthe latterterminating in. a head L having a transverse opening Z, see Figs. 8 and9,

through the head J parallel with the guidein which the arms or handles,M of the portable electric drill M are securely held, as shown indotted lines in Fig. 1.

A feed screw J 5 extending vertically bars L L, is operated by ahandwheel J and carriesa sleeve J held by a collar J pinned upon thelower end of the screwshaft, see Fig. 8. To the face of the sleeve J 7is secured a boss J to which the drill shaft, not shown, is attached.The sleeve J and its boss J revolve with the drill shaft, and inthe-boss is a hardened disk J which receives the thrust ofthe feedscrew. The drillis raised or loweredby the feed screw, the guide-bars. LL serving to prevent rotary movement while sliding freely up or-down inthe sleeves J to permit the vertical movement,

' Attached to the rectangular bar J 2 at each overhung end, is a chainN, and the bar is notched on the upper edge as at j to receive and holdthe chain in a loop by engaging alink. -The chains may each carry ahook, clamp, or magnet, or other means not shown, forattachment to thepiece to be drilled, thus serving to hold the drill firmly to its Work.

Blocks A bolted on the front-of the truck serve as guides for a pair ofanchor-bars A of rectangular cross-section, each received in a pair oftheblocks, and located one a above the other- Each bar A has a stud V orstop-pin A serving to prevent the complete withdrawal of the bar, andthe outer end of each bar carries a vertically disposed with a sleeve Fat a right angle,ihaving' a screw R adapted to rest upon and engage thefloor and thus steady the platform. The bars draw out oppositely andwhen thus drawn and'engaged oifera base of large area for the apparatusand permit the plat form A to be leveled.

By loosening the tubular slide F it may be adjusted on the radius-arm Fto bring the drill to any required radial position, or 119 above thedrill-table C. By rotating the slide F on the radius-arm F the drill maybe presented at any angle radially to-the arm. By raising or loweringthe carrier E on the column D the radius-arm and its drill may becorrespondingly raised or lowered. By'rotating the carrier E on thecolumn D the drill may be swung to any position in the horizontal circlethus described, and the drill-table C may be simi- 12 larly swung. i

In packing for transportation the tubular slide F and its connectionsare removed by sliding over the free end of the radius-arm F, the latterswungto one side of the 2 column, the swing-bolt E released and the armfolded down alongside the column; the drill-table C removed and thebracket C swung to the side of the column opposite the foldedradius-arm. The swing-bolt A is then loosened and the column with itsconnections folded down on its hinge B to the platform A. The table andhead and the removed tongue A? are then arranged on the platform and thewhole is ready to be crated for shipment.

The folding feature permitsthe apparatus Any of the usual types ofportable drills may be held in the adapter-head and easily and quicklyremoved therefrom, for service in the hands of the operator. The slightalterations or changes in fittings required for the accommodation ofvarious drills are easily made, or such fittings may be supplied for thebest known types.

In holding the portable drill to the work the drill is located inalinement with the point to be drilled and the chains N secured to thepiece. The cylindrical bar G is then raised by. the rack G: and pinion Funtil the chains are taut. The drill is then started and fed down tothe'work.

I claim:

1. In an apparatus of the character de scribed, a platform, a columnhinged thereto and adapted to fold upon said platform in the directionof the length of the latter, means for holding said column in itsvertical operative position, and a radius arm mounted on said column tofold in the direction of the length of the platform.

2. In an apparatus of the character described, a platform, a columnhinged thereto and adapted to fold upon said platform in the directionof the length of the latter, means for holding said column to itsvertical operative position, and a radius arm mounted on said column tofold in the direction of the length of the platform and having itsfulcrum disposed parallel with that of the column, whereby the radiusarm when folded will lie parallel with the column.

3. In an apparatus of the character described, a platform, a columnthereon, hinged thereto, adapted to fold upon said platform, means forholding said column in the operative vertical position, a radius-armhinged on said column and adapted to fold thereon parallel therewith,and means for holding said radius-arm in the operative horizontalposition.

4. In an apparatus of the character described, a truck, a columnfoldable thereon in the direction of the length thereof, a drill tablecarried thereby, a radius arm mounted on said column to fold in thedirection ofthe length of the latter, and drillsupporting means carriedby the radius arm for supporting a drill mechanism for cooperation withsaid table.

5. A drilling machine comprising a platform, a column thereon, a carrierembracing said column, anda rack for raising and lowering said carriermovable around said column as the carrier is rotated on the latter. v Iv In an apparatus-of the character described, a platform, a columnthereon, a

carrier inclosingv said column and rotatable thereon, a rack extendedparallel withsaid column and through said carrier to rotate with thelatter, arm raising means on the carrierengageable with-the rack andmeans for holding said rack against endwise movement.

7. In an apparatus of the character'described, a head adapted to receiveand hold a portable drill and present the same in position for service,and vertical guiding means supported by said. head and serving toprevent rotary movement of such drill as" it is raised and lowered.

8. In an apparatus of the character (16% scribed,a headadapted'toreceive and hold a portable dull and present the sameinposition for service, vertical guiding means supported by said headand serving to pre-- vent rotary movement of such drill as it is raisedand lowered, and means for holding the arms of such drill.

9. In an apparatus of the character described, a head adapted to receiveand hold a portable drill and present the same in position for service,vertical guidingmeans supported by said head and serving to preventrotary movement of such drill as it is raised and lowered, and atransverse bar carried by the head and supporting said guiding means.

10. A universal head adapted to be supported on a radius-arm andcomprising an adjustable slide rotatable on said radiusarm and carryinga bar arranged transversely of said radius-arm, a clamp encircling saidbar and rotatable thereon, and a head carried by said clamp independentof and in a plane offset from said bar for supportin a portable drill.

11. A drilling machine comprising a universal head adapted to besupported on a radius-arm and comprising an adjustable slide rotatableon said radiusarm, a tubular bar arranged transversely of said radiusarmand extending through said clamp, a rack on said tubular bar, andoperating means carried by said clamp for engaging said rack, meanscarried by said clamp for supporting a portable drill, and a feed screwfor said drill.

12. In an apparatus of the character described, a head, a transverse barthereon,

guide-bars slidably mounted on said trans verse bar, means carriedbysaid guide-bars forengaging the laterally extended handles of aportable drilhmezins for feeding said portable drill, and chains on saidtransverse bar for engaging the piece to be drilled and holding saiddrill to its WOIk.

13. In an apparatus of the character described, a head, a transverse barthereon,

slidably mounted guide bars on the trans verse bar and having means toengage means on a portable drill, and means carried by said transversebar to engage the Work to be 'drilled and hold the drill firmly to suchl5 I Work.

14. In an apparatus of the character described,a base having an annularrabbet, a

column mounted in said base to extend vertically, a cap on said columnhaving an annular rabbet,,a loose rack engaged at its ends in saidrabbet, a carrierencircling said columnoand rotatable thereon, having avertic'ally, a capon said column having an'annular rabbet, a loose rackengaged at its ends in said r'abbets, a carrier encircling said columnand rotatable'thereon, having a 'ver-- tical groove receiving said rackto cause the latter to rotate With said carrier, means on:

said carrier for engaging said rack and raising or lowering said carrierupon said column, anda roller on said rack arranged to ride upon saidbase. 1 j

16. In an apparatus of the character-described,a cylindrical base,acolumn mountedthe'rein, a bracket mounted to swing hori zontally on saidbase,i"afdrill-'table sup ported by said bracket, means carried by saidcolumn for supportinga portable drill in operable relation to saidtable, and a portable drill carried by said meansand mountedto bepresented at an angle Ito'said table and maintained-rigidly at suchangle.

17 A Wheeled truck, abase hinged there on, and locking means therefor, acolumn on said base, a carrier on said column,a ra-,

dius-arm hingedtosaid carriertojfoljd parallel with the columrnand meanscarried by said arm for supporting a drill;

In testimony that Iclaimthe invention above set forth alfix mysignature.

ERIC Gr. LINDHE;

